(h)
Connect the input rod for the bottom PCA to its input lever.
(i)
Disconnect the input rod for the middle PCA from its input lever.
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MAINTENANCE MANUAL
S 825-121
(7) Bottom PCA - Adjustment
NOTE: Before this procedure is done, make sure the airplane is
____ stable at ambient air temperature |10.0 degrees F (|5.5 degrees C). Before adjustments or adjustment checks are made, make sure the temperature has been stable for at least one hour.
(a)
Supply pressure to the center hydraulic system only
(AMM 29-11-00/201).
(b)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P11 panel: 1) 11H18, FLT CONT SHUTOFF TAIL CTR
(c)
Remove the DO-NOT-OPERATE tag and move the FLT CONTROL SHUTOFF C switch on the P61 panel to ON.
(d)
Move the input levers for the top and middle PCA fully clockwise at the same time.
NOTE: This is to release unwanted hydraulic pressure and will
____ let the rudder position become stable.
(e) Make sure the rudder trailing edge is no more than 0.05 inch
(1.27 mm) away from its neutral position.
(f) Do these steps if the rudder trailing edge is more than 0.05 inch away from its neutral position: 1) Loosen the lock nut on the input rod for the bottom PCA. 2) Do these steps to move the rudder right of neutral
approximately 0.50 inch (12.7 mm): a) Hold the input levers for the top and middle PCAs fully clockwise.
NOTE: This will remove the unwanted hydraulic pressure
____ from the top and middle PCAs.
b) Adjust the input rod for the bottom PCA until the rudder is approximately 0.50 inch (12.7 mm) to the right of its neutral position.
c) Release the input levers for the top and middle PCAs. 3) Adjust the input rod for the bottom PCA until the rudder is in its neutral position.
NOTE: Always move the rudder from right to left during the
____
adjustment.
4) Tighten the jamnut for the input rod and do these checks: a) Make sure the rudder position does not change. b) Make sure you can see input rod threads in at least
one-half of the inspection hole for the input rod.
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MAINTENANCE MANUAL
(g)
Remove the power from the center hydraulic system
(AMM 29-11-00/201).
(h)
Move the FLT CONTROL SHUTOFF C switch on the P61 panel to OFF. Attach a DO-NOT-OPERATE tag and make sure the switch position light comes on.
(i)
Open this circuit breaker on the P11 panel and attach a DO-NOT-CLOSE tag: 1) 11H18, FLT CONT SHUTOFF TAIL CTR
(j)
Make sure the FLT CONTROL SHUTOFF switches L, R, and C on the P61 panel are OFF.
WARNING: DO NOT DISCONNECT THE THREE PCA INPUT RODS AT THE SAME
_______ TIME WITH HYDRAULIC POWER ON. THE RUDDER WILL MOVE QUICKLY TO ITS FULL LEFT POSITION AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(k)
Connect the input rod for the top PCA to its input lever.
(l)
Disconnect the input rod for the bottom PCA from its input lever.
S 825-122
(8) Top PCA - Adjustment
NOTE: Before this procedure is done, make sure the airplane is
____ stable at ambient air temperature |10.0 degrees F (|5.5 degrees C). Before adjustments or adjustment checks are made, make sure the temperature has been stable for at least one hour.
(a)
Supply pressure to the right hydraulic system
(AMM 29-11-00/201).
(b)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P11 panel: 1) 11H28, FLT CONT SHUTOFF TAIL RIGHT
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